ElevenLabs alternative with speed control

Voices in ElevenLabs are great, but I create content for language learning and their voices speak way too fast
I tried using … . , and other punctuation, but to get it right I need to hear it a couple of times and, obviously, ElevenLabs charges for testing, so it’s not working out

So, basically I need ElevenLabs but with speed control

Yes, I know I can use other software to change the speed, but when I do it either the pitch is ridiculous or voices sound too electronic and unnatural

Thanks in advance